#include <stdio.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <fcntl.h>
#include <string.h>

int main()
{
    printf("hello printf\n");
    fprintf(stdout, "hello fprintf\n");
    fputs("hello fputs\n", stdout);
    
    const char *msg = "system call: hello write\n";

    write(1, msg, strlen(msg));

    fork();
    return 0;
}
